Optinmonster.com Here

Uses scroll boxes or content-gating to convert readers into subscribers. Pricing and Accessibility

Various formats are supported, including popup modals, floating bars, fullscreen takeovers, scroll boxes, sidebar forms, and spin-to-win gamified wheels. optinmonster.com

OptinMonster is a leading lead generation and conversion optimization software launched in 2013, designed to help businesses increase email subscribers, reduce cart abandonment, and boost sales. It enables users to create high-converting campaigns—such as popups, floating bars, and gamified wheels—without needing to write code. Uses scroll boxes or content-gating to convert readers

OptinMonster operates on a subscription basis, with plans aimed at different business sizes. including popup modals

Users frequently highlight the ease of use, effective customer support, and high ROI (Return on Investment).